Detachable tread for traction-wheels



H. A. DENISON. -DETACHABILE TREAD FOR TRACTION WHEELS.- APPLICATION FILED Nqv. I7. 19u.

Patented May 10,1921.

3 SHEETS-SHEET I.

HE11 1" I;H-DE msm-I H. A. nl ENlsoN. DETACHABtfE 4TREAD FORTRACTION WHEELS. n APPLlcmoN man Nov. 1-1. 1917,.- l 1,377,321, Patented Muy 10,1921.

' 3 SHEETS--SHEET 2.

-Hellryll Enisnn.

vnE'IAcHarm: TREAD non rnncTIoN-WHEELS.

Specification of Letters Patent.

Patented May 1o, 1921.

Application filed November 17, 1917. Serial No. 202,666.

T o all -w hom t may concern Be it known that I, HENRY A. DENIsoN, a citizen of the United States, and a resident of Waterville, in the county of Kennebec and State of Maine, have inventedcertain new and useful Improvements in a Detach able Tread for Traction-Wheels, of which the following is a specication.

The present invention relates to wheels, and more particularly to a tread structure for application totraction wheels, such as those of motor vehiclesand the like An object of the present invention is to provide a tread which is relatively Wide; which may be easily applied to the driving 'wheels of motor vehicles; a tread structure which may be used in connection with runners orfthe like on vehicles to be driven through snow; a detachabletread which when applied broadens the surface contact between the traction wheel andthe ground;

i and a detachable tread portion for a traction wheel which prevents the cuttingof the traction wheel in soft ground, snow or the like, and which tends to tamp the road and prevent the formation of ruts or depressions K in the same.

The invention further aims at theprovision of a detachable tread of this character which is of relatively few parts; which may be easily appliedto and removed from the ordinary carrier wheels of motor vehicles;

and a detachable tread which may be economically manufactured and handled.

The above, and various other objects and advantages of this invention willrbe in part described, and in part understood, from the following detaileddescription of the present preferred embodirnent,the same being illustrated in the accompanying drawings,

ywherein Figure 1 isa side elevation of apart of a l carrier wheel having the detachable tread of this invention applied thereto. n

Fig. 2 is a transverse section throughfthe sjame taken substantially on the line 2 2 of Fig. 3 is an outerface view ofone of the detachable slats employed.V Fig. 4 is an edge view of the same. v p Fig. 5 is aninner faceview of the slats.`

F ig. 6 is a View similar to Fig. 1 disclosing'a vslightly modied form of the invention. s

Fig. 7 is a transverse section taken on the line fle-7 cf Fig 6.

Fig. 8 is a detail side elevation of one of the attaching straps employed.

Fig. 9 is an inner face view of the same.

Fig. 10 is a fragmentary perspective 'view of a number of thetread slats, showing the lacing for holding the same together.

' Fig. 11 is a top plan view of the same.

/ Fig. 12 is a detail enlarged side elevation of a clamping device for holding ends of the intermediate lacing together.

Fig. 13 is an edge View of a securing and tightening device for holding one of the lateral lacings taut.

In the accompanying drawings, the device of this invention is disclosed as mounted upon a carrier wheel for automobiles and the like, which is of usual construction, and l which embodies a hub A supporting spokes B upon which is mounted a felly C, Vthe latter carrying a rim D upon which is placed a pneumatic tire E. 5

The ,detachable ltread `of this invention comprises acircurnferential row of spaced apart and transversely extending. slats 15 which are laced together' by strands or cables 16 and 17. The lateral cables 16 preferably Vextend twice around the circumference ofthe tread portion to provide two strands, and the strands-are oppositely laced between and over the adjacent slats 15. To maintain the strands or cables 16 from slippingV endwise from the slats, thelatter are provided in their outer and inner faces with grooves 18 and 19 respectively. Y Each cable v16 is of single length, and the slats 15 are preferably so arranged as 'to be of an odd terminate beneath the end of the one of the slats 15, as shown in Fig. 1 'v The intermediate lacing or strand 17 is preferably of single length or ply andeX-Y number, and the extremities of each cable 16 Y tends across the intermediate portions of the Y 22 is adapted to be advanced by the nuts against the overlapping` ends of the `cable 17 to bind the latter in the yoke 21 and hold the cable taut. Y

The slats 15 are of a length considerably greater than the width of the tireE, and

K- A, for the purpose of supporting the slats for contact with the road 4throughout the length of the'slats, a supplementalVV rim 23 carrying a tire 211, is employed and is held against the outer side ofthe traction wheel. The rim 23 may be provided with a supporting felly 25 corresponding in thickness and diameter to the felly C of the wheel body. The felly 25 andthe parts carried thereby are held against the wheel bodyby straps 26 which engage between the spokes B and against the inner faces of the fellies C and 25 which fellies Aand have` secured therethrough raformed inthe opposite end portions of the slats15. The tie-rodsV 27 passthrough the -slats and the straps 26, and are provided `j upon their inner threaded ends with clamping nuts adapted to draw the straps 26 against the ,inner sides ofthe` fellies and thus bindthe fellies,rtherims and the tires together, The slats 15 constitute the tread .portion of the'device and the outer surfaces thereof are adapted to Vcontact with the roadway. The clamp 21is arranged between adjacent notches or recesses 29 which are Vformed in the4 adjacent slats 15, the

clamp lying substantially within the contour1r of the tread. As shown inFig. 2, the clamp 21rlies between lthe tires E and 24, and the rods 27 are adapted to bear against the outer sides-0f the tires,the rims and the fellies to hold'the same together. :Any desired numbier of the tie-rods 27 maybe employed for ,t held together by*4 al Vclamp V8O whichv Vmay comprise a pair of opposed jaws as shown in' holding said spaced apart slats 15 againstr rthe treads,v of the tires, and Afor holding the corresponding number of straps 26 against the inner faces of the tire supports to hold the parts from Yrelative movement either circumferentiallyV or laterally.

f The free ends of he lcteral laces 16 are'y Fig. 13,'-secur`ed together by bolts or the like, and clamping theoverlapping ends of the laces. The clamp 30 is provided with an eye 31l at onerend through which a link 32 i- @is secured, the link 32 extending radially inward andpassing through a strap 33'which Y extends; transversely across the inner sides of the fellies Vof the, supporting structure VVandwhi'chissecuredat its opposite end toV a i outwardly' over the link to' draw the clamp` clamp 3Q. The inner endsof the link 32 are ee maia-ny inward andthw tighten 'the laces 16; y a Y l v`In Figs. 6 to Qinclusive, there 1s shown a i Y. modified form of supporting means for the engag tread structure. In this form the outer tire 24 issupported upon the rim 23 which 1nvstead Vof being mounted upon a felly, is

mounted upon supporting blocks 34 which are secured to the transverse strap 26. As shown particularly in Figs. 8 and. 9, the blocks 84 are of slightly greater width than that of the' strap 26 and are provided in their lower side with transverse slots receiving the strap therethrough. Screws 85 or the like, pass through the straps and into the blocks for holding the parts together.

` As shown to advantage in Figs. 10 and 11, the pairs of strands which constitute the outer lacings 16 each extend in substantially parallel planes at right angles to the axis ofthe wheel to prevent scraping .of the cables or strands which form the lacings `and to retain the slats 15 in circumferential alinement. For this purpose the outer and inner slots or recesses 18 and 19 in the opposite faces of the slats 15, are arranged al y ternately in laterally offset relation so that the upperslot or' recess in one slot registers longitudinally lwith' the lower slot or recess in the next adjacent slat. These recesses or slots 18 and 19 are of sufficient depth to `receive the lacings 16 and 17 therein to prevent undue wear of the laces and ground contact of the same. The outer surfaces of the slats 15 are adapted to take up wear and friction between the carried wheel and the ground.

It is ofcourse understood that various 'changes and modifications may be made in the details of construction and Vdesign of f the abovevspecifically described parts of this invention without Adeparting from the spirit thereof, such changes and modifications berim and said wheel body for rigidly securf ing the separate rim and the second tire beneath said slats. Y

2. The combination with a wheel body having a tire thereon, of a separate rim'with a tire7 and traction means securing the second rim and tire against the side of the wheel body and,its tire, the traction means comprising Va plurality of interlaced tread elements'of awidthto extend beyond the koutersides of the tires and clamping means ng the oppositeends of the tread ele- 'ments'and' embracing the'tires and the rim yand wheel body for 'rigidly connecting'V all of the parts together.

HENRY a. DnNrsoN. 

